<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Non-reference case for text-decoration-thickness inheritance</title>
    <style>
        span { text-decoration-line: underline; text-decoration-color: black; }
    </style>
</head>
<body>
    <p><span>Test passes if this text decoration underline is not 20px thick.</span></p>
</body>
</html>
